/*
 * DynamicReports - Free Java reporting library for creating reports dynamically
 *
 * Copyright (C) 2010 - 2018 Ricardo Mariaca and the Dynamic Reports Contributors
 *
 * This file is part of DynamicReports.
 *
 * DynamicReports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * DynamicReports is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with DynamicReports. If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.dynamicreports.examples.crosstab;

import net.sf.dynamicreports.examples.Templates;
import net.sf.dynamicreports.report.base.expression.AbstractSimpleExpression;
import net.sf.dynamicreports.report.builder.crosstab.CrosstabBuilder;
import net.sf.dynamicreports.report.builder.crosstab.CrosstabColumnGroupBuilder;
import net.sf.dynamicreports.report.builder.crosstab.CrosstabRowGroupBuilder;
import net.sf.dynamicreports.report.constant.Calculation;
import net.sf.dynamicreports.report.constant.PageOrientation;
import net.sf.dynamicreports.report.constant.PageType;
import net.sf.dynamicreports.report.datasource.DRDataSource;
import net.sf.dynamicreports.report.definition.ReportParameters;
import net.sf.dynamicreports.report.exception.DRException;
import net.sf.jasperreports.engine.JRDataSource;

import java.util.Calendar;
import java.util.Date;

import static net.sf.dynamicreports.report.builder.DynamicReports.cmp;
import static net.sf.dynamicreports.report.builder.DynamicReports.ctab;
import static net.sf.dynamicreports.report.builder.DynamicReports.field;
import static net.sf.dynamicreports.report.builder.DynamicReports.report;

/**
 * <p>GroupExpressionCrosstabReport class.</p>
 *
 * @author Ricardo Mariaca
 * 
 */
public class GroupExpressionCrosstabReport {

    /**
     * <p>Constructor for GroupExpressionCrosstabReport.</p>
     */
    public GroupExpressionCrosstabReport() {
        build();
    }

    /**
     * <p>main.</p>
     *
     * @param args an array of {@link String} objects.
     */
    public static void main(String[] args) {
        new GroupExpressionCrosstabReport();
    }

    private void build() {
        CrosstabRowGroupBuilder<String> rowGroup = ctab.rowGroup("state", String.class);

        CrosstabColumnGroupBuilder<Integer> columnYearGroup = ctab.columnGroup(new YearExpression());

        CrosstabColumnGroupBuilder<String> columnQuarterGroup = ctab.columnGroup(new QuarterExpression());

        CrosstabBuilder crosstab = ctab.crosstab()
                                       .setCellWidth(50)
                                       .headerCell(cmp.text("State / Date").setStyle(Templates.boldCenteredStyle))
                                       .rowGroups(rowGroup)
                                       .columnGroups(columnYearGroup, columnQuarterGroup)
                                       .measures(ctab.measure("quantity", Integer.class, Calculation.SUM));

        try {
            report().fields(field("orderdate", Date.class))
                    .setPageFormat(PageType.A4, PageOrientation.LANDSCAPE)
                    .setTemplate(Templates.reportTemplate)
                    .title(Templates.createTitleComponent("GroupExpressionCrosstab"))
                    .summary(crosstab)
                    .pageFooter(Templates.footerComponent)
                    .setDataSource(createDataSource())
                    .show();
        } catch (DRException e) {
            e.printStackTrace();
        }
    }

    private JRDataSource createDataSource() {
        DRDataSource dataSource = new DRDataSource("state", "orderdate", "quantity");
        Calendar c = Calendar.getInstance();
        for (int i = 0; i < 700; i++) {
            Date date = c.getTime();
            dataSource.add("New York", date, (int) (Math.random() * 10) + 1);
            dataSource.add("Washington", date, (int) (Math.random() * 10) + 1);
            dataSource.add("Florida", date, (int) (Math.random() * 10) + 1);
            c.add(Calendar.DAY_OF_MONTH, -1);
        }
        return dataSource;
    }

    private class YearExpression extends AbstractSimpleExpression<Integer> {
        private static final long serialVersionUID = 1L;

        @Override
        public Integer evaluate(ReportParameters reportParameters) {
            Calendar c = Calendar.getInstance();
            c.setTime((Date) reportParameters.getValue("orderdate"));
            return c.get(Calendar.YEAR);
        }
    }

    private class QuarterExpression extends AbstractSimpleExpression<String> {
        private static final long serialVersionUID = 1L;

        @Override
        public String evaluate(ReportParameters reportParameters) {
            Calendar c = Calendar.getInstance();
            c.setTime((Date) reportParameters.getValue("orderdate"));
            return "Q" + (c.get(Calendar.MONTH) / 3 + 1);
        }
    }
}
